CN113331803B - Closed invasive blood pressure monitoring equipment with blood sampling function and using method thereof - Google Patents
Closed invasive blood pressure monitoring equipment with blood sampling function and using method thereof Download PDFInfo
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- CN113331803B CN113331803B CN202110637390.3A CN202110637390A CN113331803B CN 113331803 B CN113331803 B CN 113331803B CN 202110637390 A CN202110637390 A CN 202110637390A CN 113331803 B CN113331803 B CN 113331803B
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- 238000010241 blood sampling Methods 0.000 title claims abstract description 44
- 230000036772 blood pressure Effects 0.000 title claims abstract description 27
- 238000012544 monitoring process Methods 0.000 title abstract description 16
- 238000000034 method Methods 0.000 title abstract description 13
- 210000004369 blood Anatomy 0.000 claims abstract description 191
- 239000008280 blood Substances 0.000 claims abstract description 191
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 230000000903 blocking effect Effects 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims description 13
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 238000012806 monitoring device Methods 0.000 claims description 6
- 239000002699 waste material Substances 0.000 abstract description 3
- 210000004204 blood vessel Anatomy 0.000 description 30
- 230000005540 biological transmission Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 239000012530 fluid Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000017531 blood circulation Effects 0.000 description 4
- 208000015181 infectious disease Diseases 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 210000004276 hyalin Anatomy 0.000 description 2
- 238000000338 in vitro Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000004872 arterial blood pressure Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000003759 clinical diagnosis Methods 0.000 description 1
- 230000035487 diastolic blood pressure Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004393 prognosis Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000035488 systolic blood pressure Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150992—Blood sampling from a fluid line external to a patient, such as a catheter line, combined with an infusion line; blood sampling from indwelling needle sets, e.g. sealable ports, luer couplings, valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
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Abstract
The invention discloses closed invasive blood pressure monitoring equipment with a blood sampling function and a using method thereof, and the closed invasive blood pressure monitoring equipment comprises a puncture tube, wherein a cavity is formed in the puncture tube; the blood plugging chamber is connected with a baffle through a baffle spring, and the baffle spring is in a compressed state in an initial state so that the baffle is tightly attached to the blood drawing tube; the blood drawing mechanism is arranged in the blood drawing tube and comprises a sealing ring tightly attached to the blood drawing tube, the sealing ring is arranged in the blood drawing tube in a sliding mode, the blood drawing mechanism further comprises a needle cylinder, and the blood drawing mechanism is in contact with the baffle. The puncture tube simultaneously realizes blood sampling and pressure measuring work, reduces the pain of puncture to patients, and is automatically closed when the blood drawing device is pulled out, thereby avoiding blood waste.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to closed invasive blood pressure monitoring equipment with a blood sampling function and a using method thereof.
Background
The invasive blood pressure detecting sensor is a measuring method that a puncture needle is directly inserted into a blood vessel of a measured part of a human body and pressure is measured by a pressure sensor connected with a pressure measuring tube, and the measuring principle is as follows: the connected catheter is firstly placed in a blood vessel of a detected part through puncture, the outer end of the catheter is directly connected with a pressure sensor, the pressure in the blood vessel is transmitted to the externally connected pressure sensor through liquid in the catheter due to the pressure transmission effect of fluid, and then the data of systolic pressure, diastolic pressure and mean arterial pressure in the blood vessel of the detected part can be continuously and accurately obtained through specific indicating equipment and a calculation method, so that objective bases are provided for clinical diagnosis, treatment and prognosis estimation of diseases, and the catheter is widely applied clinically.
The invasive pressure measurement is generally used for more serious patients, blood sampling test is often needed to be carried out frequently, blood sampling is carried out while the pressure measurement is realized by a small part of equipment at present, but the blood sampling process is complicated, a long pipeline is adopted for blood sampling, incomplete blood is injected into the bodies of the patients again, the patients are more painful in the process, excessive blood loss is easily caused, and a great deal of invariance is brought to subsequent medical work.
Disclosure of Invention
In order to solve the problems in the prior art, a closed invasive blood pressure monitoring device with a blood sampling function and a using method thereof are provided.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides closed invasive blood pressure monitoring equipment with a blood sampling function, which comprises a puncture tube, wherein a cavity is formed in the puncture tube, an outer catheter is detachably sleeved outside the puncture tube, the outer catheter is also provided with a plurality of flow holes, the outer catheter is tightly attached to the puncture tube, the outer catheter is communicated with a pressure sensor through a two-way valve, and the outer catheter is also communicated with a blood sampling tube through a blood plugging bin; the blood plugging bin is connected with a baffle through a baffle spring, and the baffle spring is in a compressed state in an initial state so that the baffle is tightly attached to the blood drawing tube; draw the intravascular set and be provided with the mechanism of drawing blood, draw blood the mechanism include with draw the closed loop that the blood vessel closely laminated, the closed loop slides and sets up draw in the blood vessel, draw blood the mechanism still include the cylinder, draw blood the mechanism with the baffle contacts.
Preferably, the length of puncture pipe is greater than the length of outer pipe, the puncture pipe both ends are connected with pjncture needle and puncture handle respectively, the outer pipe cover is established outside the puncture pipe back, the pjncture needle with the puncture handle sets up the outside of outer pipe.
Preferably, the puncture tube is opened in a plurality of puncture hole, the puncture hole sets up the outside of outer catheter, the puncture hole with the cavity of puncture tube is linked together, the puncture tube is the hyaline tube.
Preferably, a rubber plug is arranged at the joint of the puncture tube and the outer catheter, the rubber plug is connected with the inner wall of the outer catheter, and the puncture tube penetrates through the rubber plug and is in sliding connection with the rubber plug.
Preferably, the closed invasive blood pressure monitoring device with the blood sampling function is characterized in that the blood sampling mechanism comprises a blood sampling channel, the blood sampling channel is fixedly connected with a blood sampling piston matched with the blood sampling channel, and a one-way valve is arranged in the blood sampling piston; the closed ring is fixedly sleeved outside the blood drawing channel, the blood drawing channel is further provided with a blood drawing hole, and the blood drawing hole is formed between the closed ring and the blood drawing piston.
Preferably, in an initial state, a gap is reserved between the blood drawing piston and the baffle, and the blood drawing piston is made of rubber and is tightly attached to the blood drawing pipe.
Preferably, the blood pumping duct is further fixedly sleeved with a sealing plug matched with the blood pumping duct, the sealing plug is arranged on the outer side of the blood pumping duct in an initial state, and when the upper end of the blood pumping piston is flush with the upper end of the blood plugging bin, the sealing plug is contacted with the blood pumping duct; the needle cylinder comprises a needle cylinder mouth, and the blood pumping channel is also connected with a needle cylinder insertion opening matched with the needle cylinder mouth.
The invention also provides a using method of the closed invasive blood pressure monitoring equipment with the blood sampling function, which comprises the following steps:
s1, firstly, sleeving the outer catheter on the outer side of the puncture tube, enabling the puncture tube and the outer catheter to be tightly attached, and enabling the puncture tube to penetrate into a blood vessel of a human body, wherein the puncture tube drives the outer catheter to enter the blood vessel;
s2: and then after the puncture tube is pulled out, the outer catheter is plugged tightly by a rubber plug to form a closed space, blood flows through the flow hole and enters the outer catheter, the blood flows to the position of the pressure sensor through the two-way valve, the pressure sensor is used for monitoring the blood pressure in the blood vessel in real time, and after the collection work is finished, the two-way valve is opened to continue the real-time monitoring work of the blood pressure.
S3: when blood sampling is needed, the two-way valve is closed to enable the blood blocking bin to be filled with blood, the needle cylinder is connected with the blood drawing mechanism, the blood drawing mechanism drives the baffle to move downwards, the baffle spring is compressed, the blood blocking bin is communicated with the blood drawing tube, a closed space is formed in the blood drawing tube under the action of the closed ring, and blood sampling is achieved through the needle cylinder.
Preferably, the blood drawing piston is driven by the sealing plug to move towards the direction close to the baffle, air between the blood drawing piston and the baffle enters a space formed by the blood drawing piston and the closed ring under the action of the one-way valve, and when the sealing plug is contacted with a blood drawing pipe, the upper end of the blood drawing piston is flush with the upper end of the blood plugging bin; the air in the space between the blood drawing piston and the closed ring is sucked out through the needle cylinder, the blood in the blood blocking bin flows into the space formed by the blood drawing piston and the closed ring along with the continuous pushing of the sealing plug, and the blood collection work is realized through the needle cylinder.
Preferably, after the puncture tube is punctured into a blood vessel of a human, blood enters the puncture tube through the puncture hole, and the effect of puncturing by the puncture tube is judged by observing the puncture tube located outside the outer catheter.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention drives the outer catheter to enter the blood vessel of a person through the puncture tube in a mode that the puncture tube is matched with the outer catheter, and then the puncture tube is drawn out, thereby effectively reducing secondary damage to a patient, enabling the outer catheter to remain in the blood vessel of the person, facilitating the real-time monitoring work of blood pressure, sampling and collecting blood by utilizing the pressure sensor sealed in vitro, effectively reducing the pain of the patient caused by additionally puncturing and collecting blood, and reducing the possibility of infection to the lowest.
2. According to the invention, through the plurality of puncture holes arranged on the puncture tube, after the puncture needle punctures a blood vessel, blood on the inner side of the puncture needle can flow out of the puncture holes into the transparent puncture tube, so that an operator can visually observe and judge the puncture effect conveniently, and the inner diameter of the puncture tube is equal to or slightly larger than that of the outer catheter, so that the outer catheter can be conveniently driven into the blood vessel, and the arranged rubber plug can form a closed space in the outer catheter while preventing the blood from flowing out, so that the blood pressure measurement work is facilitated.
3. According to the invention, through the two-way valve, when blood sampling is carried out, the blood pressure measuring channel is closed, air between the blood drawing piston and the baffle plate is discharged into a space between the blood drawing piston and the closed ring through the blood drawing piston, air in the blood drawing piston and the closed ring is sucked out under the action of the needle cylinder, so that the space is in a state close to vacuum, blood enters the space under the action of air pressure, the condition of blood backflow can be effectively prevented, the blood drawing process is smooth, the blood can automatically flow under the action of the air pressure, blood blockage is greatly avoided, blood waste is avoided, the baffle plate is automatically closed after collection is finished, and the blood drawing device is drawn out to carry out cleaning or replacement work, so that the possibility of infection is reduced to the lowest, and the operation is more convenient.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is an overall front view of the present invention;
FIG. 2 is an enlarged view of the portion A in FIG. 1;
FIG. 3 is a schematic view of the syringe portion of the present invention;
FIG. 4 is a schematic view showing the state of engagement between the syringe and the blood evacuation tube according to the present invention;
FIG. 5 is a schematic view showing a partial structure of the puncture tube according to the present invention;
FIG. 6 is a first flowchart illustrating the operation of the present invention;
fig. 7 is a second flowchart of the present invention.
Description of reference numerals:
1 a pressure sensor; 2, pressure transmission fluid; 3 a pressure transmission membrane; 4 an outer catheter; 41 a flow aperture; a 42 two-way valve; 5, puncturing a hole; 6, puncturing a tube; 61 a puncture handle; 62, puncturing needles; 7, rubber stopper; 8, drawing a blood vessel; 81 a syringe insertion opening; 82 a sealing plug; 83 a closed ring; 84 blood-drawing vessels; 85 blood drawing holes; 87 a one-way valve; 88 a blood drawing piston; 89 baffle plates; 810 a baffle spring; 811 blocking the blood compartment; 9 a needle cylinder; 91 syringe nozzle.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1 to 7, the present embodiment provides a closed invasive blood pressure monitoring device with blood sampling function, which includes a puncture tube 6 with a cavity inside, and an outer catheter 4 detachably sleeved outside the puncture tube 6. The outer catheter 4 is a flexible and smooth tube with the same inner diameter at two ends.
The length of the puncture tube 6 is larger than that of the outer catheter 4, the puncture needle 62 and the puncture handle 61 are respectively connected to two ends of the puncture tube 6, and after the outer catheter 4 is sleeved outside the puncture tube 6, the puncture needle 62 and the puncture handle 61 are arranged outside the outer catheter 4.
The puncture needle 62 is used for puncturing blood vessels, the puncture handle 61 plays a role in convenient hand holding, and the puncture tube 6 is a relatively hard smooth tube body, so that the puncture tube can be conveniently inserted into the outer catheter 4. The outer catheter 4 and the puncture tube 6 can be deeply inserted along the direction of the guide wire in the blood vessel after entering the central venous blood vessel, can adjust the shape along with the blood vessel, and can not cause damage to the central venous blood vessel.
And the inner diameter of the puncture tube 6 is equal to or slightly larger than the inner diameter of the outer catheter 4, thereby conveniently driving the outer catheter 4 into the blood vessel. Thus, when the outer guide sleeve 4 is sleeved outside the puncture tube 6 and the puncture tube 6 passes through the outer guide sleeve 4, the outer guide sleeve 4 and the puncture tube 6 can be tightly attached without an obvious gap between the two.
Puncture tube 6 sets up in a plurality of puncture hole 5, and puncture hole 5 sets up in the outside of outer catheter 4, and puncture hole 5 is linked together with puncture tube 6's cavity, and puncture tube 6 is the hyaline tube. After the puncture needle 62 punctures the blood vessel, the blood inside the puncture needle 62 can flow out from the puncture hole 5 to the transparent puncture tube 6, so that the operator can observe and judge the puncture effect visually,
the puncture tube 6 is provided with the rubber stopper 7 with outer pipe 4 junction, and rubber stopper 7 links to each other with outer pipe 4 inner wall, puncture tube 6 run through rubber stopper 7 and with rubber stopper 7 sliding connection. Two rubber plugs 7 can be arranged, wherein one rubber plug 7 is connected with the inner wall of the outer catheter 4, during installation, the puncture needle 62 penetrates through the rubber plug 7, a medical rubber plug is adopted in the rubber plug 7, after the puncture tube 6 is separated from the outer catheter 4, the rubber plug 7 can be automatically contracted, and meanwhile, in consideration of the sealing effect, a new rubber plug 7 can be placed to realize the sealing effect of the space in the outer catheter 4.
The outer catheter 4 is also provided with a plurality of flow holes 41, blood can freely pass through the flow holes 41 along with the extrusion of the heart and the relaxation of blood vessels, and the situations that the blood on the inner wall of the catheter can not circulate for a long time and then the blood is coagulated and blocked and the like are avoided.
The outer catheter 4 is driven to enter the blood vessel of a person through the puncture tube 6, then the puncture tube 6 is drawn out, secondary damage to the patient is effectively reduced, the outer catheter 4 is left in the blood vessel of the person, real-time monitoring work of blood pressure is facilitated, sampling and blood sampling are carried out by using the pressure sensor which is sealed in vitro, pain of the patient caused by additionally puncturing and blood sampling can be effectively reduced, and the possibility of infection is reduced to the minimum.
The outer catheter 4 is provided with a branch, the outer catheter 4 is communicated with the pressure sensor 1 through a two-way valve 42, a pressure transmission film 3 is arranged between the two-way valve and the pressure sensor 1, the pressure transmission film 3 is connected with the outer catheter 4 in a sliding mode, and a pressure transmission fluid 2 is arranged between the pressure transmission film 3 and the pressure sensor 1.
The pressure transmission membrane 3 isolates the pressure transmission fluid 2 from blood in a blood vessel, the pressure transmission effect of the flow is utilized, firstly, the pressure is transmitted to the pressure transmission membrane 3, then the pressure is transmitted to the pressure transmission fluid 2 through the pressure transmission membrane 3, and the pressure transmission fluid 2 is connected with the pressure sensor 1, so that the blood pressure of a patient is obtained, and the effect of monitoring the blood pressure in real time is achieved.
The outer catheter 4 is also provided with a branch, and the outer catheter 4 is also communicated with a blood drawing tube 8 through a blood blocking bin 811; the blood blocking chamber 811 is connected to the baffle 89 through the baffle spring 810, and in an initial state, the baffle spring 810 is in a compressed state, so that the baffle 89 is tightly attached to the blood sampling tube 8. And the elastic force of the flapper spring 810 is large so that a closed space is formed inside the outer guide tube 4.
The blood drawing mechanism is arranged in the blood drawing tube 8 and comprises a sealing ring 83 tightly attached to the blood drawing tube 8, the sealing ring 83 is arranged in the blood drawing tube 8 in a sliding mode, the blood drawing mechanism further comprises a needle cylinder 9, and the blood drawing mechanism is in contact with the baffle 89. The blood drawing mechanism comprises a blood drawing pipeline 84, the blood drawing pipeline 84 is fixedly connected with a blood drawing piston 88 matched with the blood drawing pipe 8, and a one-way valve 87 is arranged in the blood drawing piston 88; the closed ring 83 is fixedly sleeved outside the blood drawing channel 84, the blood drawing channel 84 is also provided with a blood drawing hole 85, and the blood drawing hole 85 is arranged between the closed ring 83 and the blood drawing piston 88.
In the initial state, a gap is reserved between the blood drawing piston 88 and the baffle 89, the blood drawing piston 88 is made of rubber and is tightly attached to the blood drawing tube 8, and when the blood drawing piston 88 is installed, the inner wall of the blood drawing tube 8 is tightly attached to the blood drawing piston 88, so that a closed space is formed between the blood drawing piston and the baffle 89.
The blood drawing channel 84 is also fixedly sleeved with a sealing plug 82 matched with the blood drawing pipe 8, the sealing plug 82 is arranged outside the blood drawing pipe 8 in an initial state, and when the upper end of the blood drawing piston 88 is flush with the upper end of the blood plugging chamber 811, the sealing plug 82 is contacted with the blood drawing pipe 8; the syringe 9 includes a syringe nozzle 91, and the blood evacuation tube 84 is further connected to a syringe insertion port 81 adapted to the syringe nozzle 91.
In practice, the syringe nozzle 91 and the syringe insertion opening 81 may be luer connectors, for example, one of the syringe insertion opening 81 and the syringe nozzle 91 may be a male connector and the other may be a female connector. Of course, the present application is not limited thereto, and those skilled in the art can select other suitable linkers according to the needs.
The invention also provides a using method of the closed invasive blood pressure monitoring equipment with the blood sampling function, and the closed invasive blood pressure monitoring equipment with the blood sampling function comprises the following steps:
s1, firstly, the outer catheter 4 is sleeved outside the puncture tube 6, the puncture tube 6 is tightly attached to the outer catheter 4, and the puncture tube 6 is punctured into a blood vessel of a human body, so that the puncture tube 6 drives the outer catheter 4 to enter the blood vessel;
s2: then after the puncture tube 6 is pulled out, the outer catheter 4 is plugged by the rubber plug 7, so that the outer catheter 4 forms a closed space, blood flows through the flowing hole 41 and enters the outer catheter 4, the blood flows to the position of the pressure sensor 1 through the two-way valve 42, and the pressure sensor 1 is used for monitoring the blood pressure in the blood vessel in real time;
s3: when blood sampling is needed, the two-way valve 42 is closed to enable blood to fill the blood blocking bin 811, the needle cylinder 9 is connected with the blood sampling mechanism, the blood sampling mechanism drives the baffle 89 to move downwards to enable the baffle spring 810 to compress, the blood blocking bin 811 is communicated with the blood sampling tube 8, a closed space is formed in the blood sampling tube 8 under the action of the closed ring 83, blood collection is achieved through the needle cylinder 9, and after the blood collection is completed, the two-way valve 42 is opened to continue real-time blood pressure monitoring.
The sealing plug 82 drives the blood drawing piston 88 to move towards the direction close to the baffle 89, under the action of the one-way valve 87, air between the blood drawing piston 88 and the baffle 89 enters a space formed by the blood drawing piston 88 and the sealing ring 83, and when the sealing plug 82 is contacted with the blood drawing pipe 8, the upper end of the blood drawing piston 88 is flush with the upper end of the blood blocking bin 811; the air in the space between the blood drawing piston 88 and the closed ring 83 is sucked out through the needle cylinder 9, and the blood in the blood blocking bin 811 flows into the space formed by the blood drawing piston 88 and the closed ring 83 along with the continuous pushing of the sealing plug 82, so that the blood collection work is realized through the needle cylinder 9.
After the puncture tube 6 is punctured into a blood vessel of a person, blood enters the puncture tube 6 through the puncture hole 5, and the effect of puncturing by the puncture tube 6 is judged by observing the puncture tube 6 positioned outside the outer catheter 4.
In step S2, two rubber plugs 7 are provided, wherein one rubber plug 7 is initially disposed in the outer catheter 4, and after the puncture tube 6 is pulled out, the rubber plug 7 can be freely locked to achieve a primary sealing effect of the outer catheter 4, and then a new rubber plug 7 is inserted to form a closed space in the outer catheter 4.
When the blood sampling device works, the two-way valve 42 is closed, the blood pressure measuring channel is closed, the air between the blood sampling piston 88 and the baffle 89 is discharged into the space between the blood sampling piston 88 and the closed ring 83 through the blood sampling piston 88, the air in the blood sampling piston and the closed ring is sucked out under the action of the needle cylinder 9, and the space is in a state close to vacuum, so that the blood enters the space under the action of air pressure, the blood backflow can be effectively prevented, the blood sampling process is smooth, the blood can automatically flow under the action of the air pressure, the blood blockage is greatly avoided, and the waste of the blood is avoided.
And after the collection is finished, the baffle 89 is automatically closed under the action of the baffle spring 810, the blood in the blood drawing pipe 8 is taken out by the closed ring 83 and the blood drawing piston 88 along with the outward movement of the blood drawing piston 88 by pulling out the blood drawing piston 88, so that the inside of the pipeline is kept clean, the cleaning or replacing work is carried out, the possibility of infection is reduced to the minimum, and the operation is more convenient.
In the process, the sealing plug 82 determines the position of the blood drawing piston 88, when the sealing plug 82 is contacted with the blood drawing pipe 8, the upper end of the blood drawing piston 88 is flush with the bottom end of the blood drawing pipe 8, therefore, the air between the blood drawing piston 88 and the sealing ring 83 can be sucked out through the needle cylinder 9, along with the continuous pushing of the blood drawing piston 88, the space between the blood drawing piston 88 and the sealing ring 83 is communicated with the blood blocking bin 811, and the blood pressure enters the space between the blood drawing piston 88 and the sealing ring 83 under the action of the air pressure. Meanwhile, the sealing plug 82 is in contact with the blood pumping pipe 8, so that a secondary sealing effect is achieved, air or micro dust is prevented from entering a space formed by the sealing plug 82 and the sealing ring 83, and blood pollution is prevented.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (3)
1. The closed invasive blood pressure monitoring device with the blood sampling function comprises a puncture tube (6) with a cavity formed inside, and is characterized in that an outer catheter (4) is detachably sleeved outside the puncture tube (6), the outer catheter (4) is further provided with a plurality of flow holes (41), the outer catheter (4) is tightly attached to the puncture tube (6), the outer catheter (4) is communicated with a pressure sensor (1) through a two-way valve (42), and the outer catheter (4) is further communicated with a blood sampling tube (8) through a blood plugging bin (811); the blood blocking bin (811) is connected with a baffle (89) through a baffle spring (810), and in an initial state, the baffle spring (810) is in a compressed state, so that the baffle (89) is tightly attached to the blood drawing tube (8); a blood drawing mechanism is arranged in the blood drawing tube (8), the blood drawing mechanism comprises a closed ring (83) tightly attached to the blood drawing tube (8), the closed ring (83) is arranged in the blood drawing tube (8) in a sliding manner, the blood drawing mechanism further comprises a needle cylinder (9), and the blood drawing mechanism is in contact with the baffle (89);
the puncture tubes (6) are arranged in a plurality of puncture holes (5), the puncture holes (5) are arranged on the outer side of the outer catheter (4), the puncture holes (5) are communicated with the cavities of the puncture tubes (6), and the puncture tubes (6) are transparent tubes;
the blood drawing mechanism comprises a blood drawing channel (84), the blood drawing channel (84) is fixedly connected with a blood drawing piston (88) matched with the blood drawing pipe (8), and a one-way valve (87) is arranged in the blood drawing piston (88); the closed ring (83) is fixedly sleeved outside the blood pumping channel (84), the blood pumping channel (84) is also provided with a blood pumping hole (85), and the blood pumping hole (85) is arranged between the closed ring (83) and the blood pumping piston (88);
in an initial state, a gap is reserved between the blood drawing piston (88) and the baffle (89), and the blood drawing piston (88) is made of rubber and is tightly attached to the blood drawing pipe (8);
the blood drawing pipeline (84) is also fixedly sleeved with a sealing plug (82) matched with the blood drawing pipe (8), the sealing plug (82) is arranged on the outer side of the blood drawing pipe (8) in an initial state, and when the upper end of the blood drawing piston (88) is flush with the upper end of the blood blocking bin (811), the sealing plug (82) is contacted with the blood drawing pipe (8); the needle cylinder (9) comprises a needle cylinder nozzle (91), and the blood pumping channel (84) is also connected with a needle cylinder insertion opening (81) matched with the needle cylinder nozzle (91);
the sealing plug (82) drives the blood drawing piston (88) to move towards the direction close to the baffle (89), under the action of the one-way valve (87), air between the blood drawing piston (88) and the baffle (89) enters a space formed by the blood drawing piston (88) and the closed ring (83), and when the sealing plug (82) is contacted with the blood drawing pipe (8), the upper end of the blood drawing piston (88) is flush with the upper end of the blood blocking bin (811); the gas in the space between the blood drawing piston (88) and the closed ring (83) is sucked out through the needle cylinder (9), along with the continuous pushing of the sealing plug (82), the blood in the blood blocking bin (811) flows into the space formed by the blood drawing piston (88) and the closed ring (83), and the blood collection work is realized through the needle cylinder (9).
2. The closed invasive blood pressure monitoring device with blood sampling function according to claim 1, wherein the length of the puncture tube (6) is greater than the length of the outer catheter (4), a puncture needle (62) and a puncture handle (61) are respectively connected to two ends of the puncture tube (6), the outer catheter (4) is sleeved outside the puncture tube (6), and the puncture needle (62) and the puncture handle (61) are arranged outside the outer catheter (4).
3. The closed invasive blood pressure monitoring device with blood sampling function according to claim 1, characterized in that a rubber plug (7) is arranged at the joint of the puncture tube (6) and the outer catheter (4), the rubber plug (7) is connected with the inner wall of the outer catheter (4), and the puncture tube (6) penetrates through the rubber plug (7) and is slidably connected with the rubber plug (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110637390.3A CN113331803B (en) | 2021-06-08 | 2021-06-08 | Closed invasive blood pressure monitoring equipment with blood sampling function and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110637390.3A CN113331803B (en) | 2021-06-08 | 2021-06-08 | Closed invasive blood pressure monitoring equipment with blood sampling function and using method thereof |
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| CN113331803A CN113331803A (en) | 2021-09-03 |
| CN113331803B true CN113331803B (en) | 2022-09-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695555A (en) * | 2005-05-27 | 2005-11-16 | 四川大学华西医院 | Closed type artery indwelling needle |
| CN103519830B (en) * | 2013-07-29 | 2015-01-21 | 南通大学附属医院 | Blood collection device used during invasive artery monitoring |
| CN104771208A (en) * | 2015-01-28 | 2015-07-15 | 吴洪磊 | Artery puncture needle special for invasive arterial pressure monitoring |
| CN204813853U (en) * | 2015-05-27 | 2015-12-02 | 深圳市顺美医疗科技有限公司 | Invasive pressure monitoring sensing equipment of area blood sampling function |
| CN212186511U (en) * | 2018-10-30 | 2020-12-22 | 张曰恒 | Multifunctional self-sealing type safe artery blood taking needle |
| CN109907748B (en) * | 2019-05-20 | 2024-02-06 | 山东大学齐鲁医院 | Invasive blood pressure measuring device convenient for blood sample collection |
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